2006-09-08 16:41:11 · 15 answers · asked by ♪ ♫ ☮ NYbron ☮ ♪ ♫ 6 in Science & Mathematics ➔ Biology
Your body has produced entirely new cells from the time that you were born. You, in fact, are a completely different person, physiologically speaking. However, your nerve cells and brain cells don't replicate (which is why stem cell research is a big issue). Our bodies are pretty amazing. You body changes every hour.
2006-09-08 16:55:59 · answer #1 · answered by kashpole 1 · 0⤊ 0⤋
I was actually thinking about this at work the other day. We have none of the cells we had when we were infants. They continually replace themselves. It's interesting because most of us can remember things that happened to us when we were 3 or 4, sometimes before that.... but our brain cells have changed thousands upon thousands of times.
2006-09-09 01:00:12 · answer #2 · answered by almostdead 4 · 1⤊ 0⤋
Women have their eggs and there are some brain cells. Other than that, your body makes new cells everyday. I believe the average life span of a red blood cell is 3 months - so every three months, you get new cells - but not all at once - LOL.
Hope that helped.
2006-09-09 00:19:21 · answer #3 · answered by Weasel 4 · 0⤊ 0⤋
None; almost a million new bloodcells are created almost every half hour or so. Skin cells are replaced as it wears off, which is quite often. Nerve cells don't grow back, which is why you can't recover easily from an injury. Muscle cells also regenerate and repair themselves if damaged, within limits.
2006-09-08 23:48:03 · answer #4 · answered by Display Name 3 · 0⤊ 0⤋
The female reproductive cells, otherwise known as "eggs", are all present at birth. These are the only cells that you're born with that might still exist.
2006-09-09 00:04:04 · answer #5 · answered by Box815 3 · 0⤊ 0⤋
The nerve cells of your brain. This article provides a proof and gives some of the renewal cycles for other parts of the body.
Oops, I forgot to say how many. It's about 100 trillion.
2006-09-08 23:55:57 · answer #6 · answered by Kuji 7 · 1⤊ 0⤋
None of them. Every cell is replaced every 5 to 7 years.
2006-09-08 23:43:13 · answer #7 · answered by Joe K 6 · 0⤊ 0⤋
Joe K
Level 4
None of them. Every cell is replaced every 3 to 4 years.
2006-09-08 23:44:40 · answer #8 · answered by Anonymous · 0⤊ 1⤋
It is true that we still do have the same brain cells. What you should still understand is that these are not the "same" cells. Every single atom (except the DNA!) has been replaced over time as misc. organic molecules have been replaced. It is cool to still think that the DNA molecules I was born with, these exact atoms of C,N,O,H,P, are still there in my brain. Super Cool!
2006-09-09 00:06:39 · answer #9 · answered by Bauercvhs 4 · 0⤊ 1⤋
Brain cells are not replaced as often as others or the memory would be lost. I'm not sure exactly how long they last though.
2006-09-08 23:46:49 · answer #10 · answered by Anonymous · 0⤊ 0⤋